battery - n. a device that is placed inside a machine (such as a clock, toy, or car) to supply it with electricity

transform - v. to change something completely usually in a good way

leading edge - n. being in the lead, out front

confident - adj. having a feeling or belief that you can do something well or succeed at something

range - n. a specified distance

lithium - n. a soft silver-white element that is the lightest metal known used in batteries for electronics